If your columns were created by enclosing them within double quotes, so that they are mixed case, like "Field1", which is a bad practice for this and other reasons, then you need to list them the same way, "Field1", in your control file. If you can, it is better to re-create the table with the field names in upper case to avoid these and other problems.

Unless your data actually looks like "dataTabdataTab..." where "Tab" is your delimiter, if you mean that it is delimited by the Tab key, then you need to use "fields terminated by x'09'".